Electronic fuel injection control apparatus using variable resistance for relating intake air speed to engine speed
US4121545A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 3, 1976 |
| Grant date | Oct 24, 1978 |
| Priority date | — |
| Expiry date | Feb 3, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/28
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An electronic fuel injection control apparatus is provided with a first sensor to determine the volume of intake air and a second sensor providing an electrical signal the magnitude of which is related to the engine speed. The detected air volume is translated into a corresponding pivotal movement. A variable resistance element is arranged to alter its value in accordance with the pivotal movement. The engine speed related signal is connected to the end terminals of the resistance element to develop a voltage representing the engine speed. The variation of the resistance value produces corresponding variation in voltage across the output terminals of the resistance. The output voltage is thus related both to the engine speed and intake air volume, and used to modulate the duration of a pulse produced per engine revolution to provide an injection control signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.